As myelin is lost from axons:
A)The capacitance increases
B)The distance that graded potentials can spread before dying out is reduced
C)Action potentials become less likely
D)All of the above

Question

Quizplus · Accepted Answer

As myelin is lost from axons, the capacitance increases due to the increase in surface area. This increases the time taken for the action potential to travel down the axon. The distance that graded potentials can spread before dying out is reduced as the loss of myelin results in less efficient propagation of electrical signals. As a result, the smaller the distance traveled, the more likely the signal will die out before it reaches the endpoint. Finally, action potentials become less likely as they require sufficient membrane depolarization, which becomes difficult and inefficient with the loss of myelin.

As Myelin Is Lost from Axons